Question 1

Which of the following best describes the position of the heart in the thoracic cavity?

Accepted Answer

It is located in the mediastinum, between the lungs, with the apex pointing to the left and the base directed superiorly.

Question 2

Which of the following correctly compares arteries and veins in terms of structure and function?

Accepted Answer

Arteries have thicker muscular walls and carry blood away from the heart, while veins have valves and carry blood toward the heart.

Question 3

Which structure is responsible for initiating the electrical impulse that causes the heart to contract?

Accepted Answer

Sinoatrial (SA) node

Question 4

A patient has a blockage in the left coronary artery. Which area of the heart is most likely to be affected?

Accepted Answer

Left atrium and left ventricle

Question 5

Which of the following best describes the pathway of blood through the pulmonary circuit?

Accepted Answer

Right ventricle → pulmonary arteries → lungs → pulmonary veins → left atrium

Question 6

Which of the following is a function of the coronary arteries?

Accepted Answer

They supply oxygenated blood to the myocardium.

Question 7

Which of the following best describes the function of capillaries?

Accepted Answer

They serve as sites of exchange for gases, nutrients, and waste products between blood and tissues.

Question 8

A patient is diagnosed with tachycardia. Which of the following best describes this condition?

Accepted Answer

A heart rate above 100 beats per minute

Question 9

Which of the following is the correct sequence of electrical conduction in the heart?

Accepted Answer

SA node → AV node → Bundle of His → Purkinje fibers

Question 10

Which of the following best describes the function of the pericardium?

Accepted Answer

It anchors the heart in the thoracic cavity and reduces friction during heartbeats.

Question 11

A patient has a blood pressure reading of 140/90 mmHg. What does the top number (140) represent?

Accepted Answer

The pressure in the arteries during ventricular contraction (systolic pressure)

Question 12

Which of the following arteries supplies blood to the brain?

Accepted Answer

Carotid artery

Question 13

Which vessel carries oxygenated blood from the lungs to the heart?

Accepted Answer

Pulmonary vein

Question 14

Which of the following best describes the function of valves in veins?

Accepted Answer

They prevent the backflow of blood, especially in the limbs.

Question 15

A patient has a blockage in the right subclavian artery. Which area is most likely to experience reduced blood flow?

Accepted Answer

Right arm

Question 16

Which of the following is a correct description of the systemic circuit?

Accepted Answer

It carries oxygenated blood from the left ventricle to the body and returns deoxygenated blood to the right atrium.

Question 17

Which of the following best describes the function of the aorta?

Accepted Answer

It carries oxygenated blood from the left ventricle to the systemic circulation.

Question 18

A patient is found to have bradycardia. Which of the following best describes this condition?

Accepted Answer

A heart rate below 60 beats per minute

Question 19

Which of the following best explains why the left ventricle has a thicker wall than the right ventricle?

Accepted Answer

It pumps blood at a higher pressure to the entire body.

Question 20

A patient’s blood pressure is measured as 120/80 mmHg. Calculate the pulse pressure using the formula $$Pulse\ Pressure = Systolic\ Pressure - Diastolic\ Pressure.$$

Accepted Answer

$$Pulse\ Pressure = 120 - 80 = 40\ mmHg$$

Cardiovascular and Respiratory System Study Notes

Study Guide - Practice Questions

Study Guide - Flashcards